Yet another DPC latency issue - Win 10 x 64 Pro - build 1803

Following a fresh reinstall it seems I am now in the same position as many before me - high DPC latency causing audio crackling, popping and distortion (especially in Kodi :-( )

I've read everything I can find online and yet I'm still suffering this issue.

This is a fresh install of windows 10 x64 Pro RS 4 on a Dell Inspiron 15r se (7520).

Accordingly to Latencymon the high DPC latency is being caused by ndis.sys. The ISR is down to i8042prt.sys which is the driver for my laptop keypad.

The issue with DPC does go away if I disable the Wireless NIC (Intel Centrino N 2230) but I need the wireless option. I have tried the all available drivers for the Centrino N 2230, none seem to make any difference.

I have power settings to max and 100% cpu usage min / max with no sleep on wifi and no power control on usb etc.

I've set the /tick and done a tcp optimizer.

Its work pointing out that I have ghosted a clean fresh windows 10 install so I can restore and test drivers at any time.

any thoughts?? Latencymon results are included below. The annoying thing is that I had no issue before I decided to rebuild to RS4. And yes I have tried going back to RS3, I even did a low level format for the sake of cleanness.

Wi-Fi is a known cause of your problem. However, I have a Dell Inspiron 15, 5577 model. I bought it mainly to use in my recording studio for on-site recordings (using Cakewalk Sonar or Studio One 3 Pro recording software). I worked on getting the PC configured for recording but still had dropouts and DPC Latency. It came with an M.2 SSD and space for an added hard drive or SSD. I Installed a spare SSD I had and made it a dual boot, the original Dell image and a second with Win 10, necessary drivers and my recording software and nothing else. If I want regular PC use I boot to the Dell M.2 image. If I want to use it for recording, I boot to the recording image.

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I've now tried windows 8.1 and windows 7 - both are giving the same dropouts and high DPC. I'm starting to think it might be a hardware issue. To be fair I had the laptop apart a few weeks back to clean the dust out (as I've done every couple of years). If I damaged or didnt reseat the pci-e cables correctly could it cause this kind of issue? I'll try taking it apart again at the weekend and take another look.

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